无法将可绘制的矢量转换为Android中的可绘制的位图 [英] Unable to convert vector drawable to bitmap drawable in android

问题描述

我正在尝试将位图转换为字节数组，其中我已将矢量可绘制图像转换为位图，然后将其转换为字节数组，但是当我打开应用程序时，它向我显示了一个错误类强制转换异常，无法转换矢量可绘制到位图可绘制.

I am trying to convert a bitmap to byte array in which i have taken an vector drawable image to bitmap and then i have converted it to byte array but when i open the application it shows me an error class cast exception unable to convert vector drawable to bitmap drawable.

 Resources res = getResources();
   Drawable drawable = res.getDrawable(R.drawable.ic_motorcycle_black);
    if (drawable != null) {
        drawable.setColorFilter(0xffff0000, PorterDuff.Mode.MULTIPLY);
    }
    Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
    final byte[] bike = stream.toByteArray();

错误:

  Caused by: java.lang.ClassCastException: android.graphics.drawable.VectorDrawable cannot be cast to android.graphics.drawable.BitmapDrawable
                                                                  at codingtown.coconut.otherexpense.activity.AddNewExpenseCategoryActivity.intialize(AddNewExpenseCategoryActivity.java:82)
                                                                  at codingtown.coconut.otherexpense.activity.AddNewExpenseCategoryActivity.onCreate(AddNewExpenseCategoryActivity.java:67)
                                                                  at android.app.Activity.performCreate(Activity.java:6092)
                                                                  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1112)

推荐答案

您可以尝试一下.对我来说很好.

You can try this. It works fine with me.

private BitmapDescriptor bitmapDescriptorFromVector(Context context, @DrawableRes  int vectorDrawableResourceId) {
    Drawable background = ContextCompat.getDrawable(context, R.drawable.ic_map_pin_filled_blue_48dp);
    background.setBounds(0, 0, background.getIntrinsicWidth(), background.getIntrinsicHeight());
    Drawable vectorDrawable = ContextCompat.getDrawable(context, vectorDrawableResourceId);
    vectorDrawable.setBounds(40, 20, vectorDrawable.getIntrinsicWidth() + 40, vectorDrawable.getIntrinsicHeight() + 20);
    Bitmap bitmap = Bitmap.createBitmap(background.getIntrinsicWidth(), background.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    background.draw(canvas);
    vectorDrawable.draw(canvas);
    return BitmapDescriptorFactory.fromBitmap(bitmap);
}

这篇关于无法将可绘制的矢量转换为Android中的可绘制的位图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！